package org.little.test.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
	public static   String  Md5(String plainText) {
		int i;
		StringBuffer buf = new StringBuffer("");
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(plainText.getBytes());
			byte b[] = md.digest();
			
			for (int offset = 0; offset < b.length; offset++) {
				i = b[offset];
				if (i < 0)
					i += 256;
				if (i < 16)
					buf.append("0");
				    buf.append(Integer.toHexString(i));
			}
//			System.out.println("result: " + buf.toString());// 32位的加密
//			System.out.println("result: " + buf.toString().substring(8, 24));// 16位的加密
		} catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return  buf.toString();
	}
}
